A car slows down from 65 km/s to 30 km/s in 5 seconds. What is its acceleration?

The x-coordinate of a particle in curvilinear motion is given by x = 3.1t3 - 4.9t where x is in feet and t is in seconds. the y-component of acceleration in feet per second squared is given by ay = 2.3t. if the particle has y-components y = 0 and vy = 5.0 ft/sec when t = 0, find the magnitudes of the velocity v and acceleration a when t = 1.8 sec. sketch the path for the first 1.8 seconds of motion, and show the velocity and acceleration vectors for t = 1.8 sec. answers: v = ft/sec a = ft/sec2

The earth is constantly spinning on its axis, like you might spin a basketball on your finger. it is this spinning of the earth that causes

When you push downward on a book at rest on a table, you feel an upward force. does this force depend on friction? defend your answer.